Molding-machine.



PATENTED MAY 29, 1906.

' W. M DUNCAN.

- MOLDING MACHINE.

APPLICATION FILED MAB..13, 1905 2 SHEBTS-SHEET 1.

PATENTEI) MAY 29, 1906.

W. M. DUNCAN. MOLDING MACHINE. APPLIOATION FILED mums, 1905.

2 SHEETS-SHEET 2.

UnrTi-rn PATENT enrich.

WiQLDlNGWWlAQl HNEH Specification of Letters Patent.

;atented May 29, 1906.

Application filed March 18, 1905. Serial lilo. 249,886.

T (0 whom it map concern. I

Be it known that LWILLIAM MILLEN DUN- can, a citizen of the United States, residing in Alton, in the county of Madison and State of Illinois, have invented certain new and useful Improvements in Molding-Machines, of which the following is a full, clear, and exact. description, reference being had to the accompanying drawings, forming part of this specification.

My invention relates to a molding-machine of the character shown and described in United States Letters Patent issued to myself and James Duncan, July 15, 1902, No. 704,712, the object of the present improvement being to so construct a molding--ma= chine of thetype named that the mold-carrying-members are supported by an open frame having a single pivotal support, whereby said frame may berotated vertically and access obtained thereto at the front thereof and at both of its sides.

A further object of the present improvement is to provide for the horizontal rotation of the mold-carrying members and the frame by which they are supported, so that the mold may be moved in a circular path while supported by said members, thereby permitting of access being gained to the I mold at any point around the machine.

Figure 1 is a front elevation of my machine. Fig. 11 is a side elevation with parts shown in vertical section. Fig. 11.1 is a view, partly in elevation and partly in vertical section, showing the swinging frame of the ma chine in inverted position, from which it is seen in Figs. 1 and 11. Fig. IV is a section of a two-way valve through which the flow of lluid to the u pper fluid-cylinder is controlled. Fig. V is a section of the four-way valve by which the flow of air to the lower fluid-cylinder is controlled.

1 d esign ates the platform of a truck, havin g. wheels 2, that are adapted to travel upon. track-rails In the platform 1 at its upballs ttravel.

5 designates a standard provided. at its lower end with an enlargement in the term of a turn-table 6,that is provided with a raceper sideis a raceway 1, in which antifriction- Way 7 inits lower side, in which the bearing balls 4 operate, thereby providing for hori zontal rotation of the standard 5. This standard is provided at its lower end with a stem 5, that is rotatably secured in the platform 1. At the upper end of the standard 5is a boxing 8.

9 designates a frame or yoke that is approximately of U shape and from the rear side of which projects an axle 10, that is loosely fitted to the boxing 8 to rotate therein and provide for rotation of the frame 9.

11 designates a lower fluid-cylinder attached to one of the arms of the rotatable frame 9 and having abottom head 12-and a top head 13, the latter being provided with a bed-plate 14-. The bed-plate 1a is surmount ed by vertical posts 15, that support a table ring 16.

17 designates a pistoitrod that operates through the cylinder-heads 12 and i3 and which bears within the cylinder 1 1 apiston 1 8.

19 is a pattern-carrying plate secured to the upper end of the piston 17 and which is adapted to be moved into a position within the table- .ring 16, as seen in Figs. 1 and 11, and with-- drawn from such position, as seen in Fig. Hi. This plate 19 is adapted to have attached to it a pattern, as seen at A, so that said pattern will be moved with the plate.

20 and 21 designate pipes leading, respectively, to the lower and upper ends of the fluid-cylinder 11. to convey fluid into said cylinder to actuate the piston 18 and in.- part reciprocation to the piston 17 and pat-- tern-carrying plate 19. The How of 'lluid to said pipes is controlled by a four-way valve 22 (shown most clearly in Fig. V) and through which the fluid passes to gain ae cess to either of the pipes 20 and. 21.

25 is a iluidconducting pipe leading to and connected "to the valve 22 through the medium of a nipple 2S, and 24 is an exhaustnipple through which fluid is discharged from either of the pipes 20 and 21 and from either end of the cylinder 11.

The table-ring 16 serves as a support for a flask B, into which the of the mold is rammed around th pattern A when said pattern is upheld in position seen in ice C is a sand-retaining board that is positioned upon the flask after the sand has been rannned therein.

. 26 designates an upper fluid-cylinder at tached to the second arm of the frame 9 and having a bottom head 27 and a top head 28.

29 is a pistons'od that operates through the bottom cylindenhead 27 and which is equipped within the cylinder 26 with a -pis ton 3d. 7

31 is a retractingspring surrounding the piston and which acts to hold the piston projected toward the upper or outer end of the cylinder is a platen fixed to the lower or inner end of the piston 29 exterioi of the cylinder :25 and which therefore susceptible of moving with said piston in a direction toward tablenjng 16 and the mold situated above said tablc-ring.

is a two-way valve fitted to the outer head 28 of the cylinder 26 and through which fluid is admitted to said cylinder. This valve is provided with-a nipple 341, to which fluid-conducting pipe 32 is connected, and an exhaustmipple 35, through which fluid may be discharged from said cylinder.

in. the practical. use of my machine the four-way valve 22 is first so manipulated as to occasion flow of fluid from the conductpipe 25 tln oughsr-iid valve and into the p to be delivered. into the lower fluid- .idcr 11 to force the piston 18 upwardly aid. cylinder and carry the pattern-plate the position. seenin Figs. 1 and II, the table-ring 16. At this'time the is in the vertical position (seen in the t-named figures) and the pattern A, being red to the ulatc 19, occupies a position above the love of the table-ring 16. The {l is then placed upon the tablering introduced, thereinto and. rammed send has beenthorou hl rammed the L g retan'iingboard U is placed upon the flask, thereby covering the sand. Then by manipulatim the two-wa valve 33 fluid is erv (D u upon the platen n", wed to flow from the conducting-pipe 36 .o the upper end. of the cylinder 26 and 'o i the piston and piston-rod 29 t dly against the action of the spring to rebv carrying the platen 32 to the board f), as seen in dotted V v The frame 6, with all of the associated. therewith, then rotated, .at the parts will be inverted from the DJollll'ifll seen in Figs. I and II to the positions seen in. Fig. III. The mold now rests 32 with the san l-retaining board C located beneath the flask and the sand therein. The four-way valve 22 is then .eXhaust-ni plc 24.

us pattern to produce the mold. Af-

manipulated to permit exhaust of the fluid from the pipe 20 and the end of the cylinder 11 with which said pipe communicates, the fluid escaping from the valve through the In such manipulation of the va-ve 22 communication is estab lished for the flow of fluid from the conducting-pipe through the valve into the pipe 21 and the end of the cylinder .1 1, with w ich said last-named pipe communicates, which end is at this time lowermost. The inflowing iluid acts within the cylinder against the piston 18 and forces said piston and the piston-rod 17 upwardly, thereby elevating the pattern-carrying plate 19 and withdrawin the pattern from the sand in the mold an through the table-ring 16. Fluid-pressure is then relieved from the cylinder 1 26 by manipulating the valve 33 so that the fluid will be exhausted from said cylinder through the nipple. 35 of said valve and cut off. from entering said cylinder. The (piston 30 and iston-rod 29 are then force downwardly y the retractin -s ring 31, thereby causing the platen 32 to he owered from the seen in dotted lines to the position seen in full lines, Fig. III, thus'se arating the mold from the table-ring 16 an permitting of the removal of said mold in its finished condition, while resting upon the sand-retaining board 0, after which a suitable co emold member is fitted to the mold'forme d in the machine, which constitutes the drag member of the mold. To place the machine in condition for operation in producing the next mold, the frame 9 is rotated so as to again invert it and bring the parts back to the positions seen in Figs. I and II, the fluid from the conducting-pipe 25 being at a suitable time again admitted to the lower end of the cylinder 11 through the pipe20 to raise the pattern-carrying plate 19 to the table ring 16, after which the operation of producing the mold to be next made is carried out in the same manner as before.

I claim as my invention 1. In a molding-machine, the combination of a support, a rotatable frame pivoted to said support, a fluid-cylinder carried by said frame, a piston operating in said cylin der, a piston-rod by which said piston is ca ried, a pattern-carrying plate hxed to said piston, a table-ring carried by said cylinder and into which. said pattern-carrying plate is adapted to move, a second cylinder carried by said frame, a piston o eratin in said second cylinder, a piston-ro( ,carrie by Said piston, and. a platen carried by said. piston-rod and-adapted to be moved toward said table-ring, substantially as set forth.

2. In a molding-machine, the combina-.

position tion of a support, a rotatable frame pivoted piston,' a platen carried by said piston-rod to said support, a fluid-cylinder carried by and adapted to be moved toward said tablesaid frame, a piston operating in said cylinrin and a retracting-spring surrounding der, a piston-rod by which said ipiston is carsai piston-rod within said second cylinder, 5 ried, "a pattern-carrying plate xed to said substantially as set forth. 4

iston, a table-ring carried by said cylinder T and into which said pattern-carrying plate WILLIAM MILLEN DUNCAN is adapted to move, a second cylinder car- In presence ofried by said frame, a piston operating in said J. N. CRAWFORD,

10 second cylinder, a piston-rod carried by said JOHN ANDERSON. 

